There is a local organization in our area that neuters male feral cats to keep the growing cat population down. Veterinarians neuter the males free of charge.
I remember a gal coming into our office years back. We were semi-rural and there was a feral cat with kittens living in the industrial complex somewhere. She was a girl from British Columbia who was now in Ontario because that’s where the largest feral cat population existed, Hamilton, in particular.
She spent her days catching feral cats. I assumed that when they caught them, they euthanized them. She looked at me, horrified, when I casually mentioned that. She told me they had as much right to live as I did. She told me that they catch them, neuter them, and return them to their “commune”.
I then asked her how they eventually die. She fidgeted a bit and admitted they get hit by cars, freeze to death, starve to death or get sick and die. I looked at her, horrified, and told her I think I cared more about the cats than she did.